Firing a caught event - javafx-2

Question

This question is so obvious, and I am sure that it is so easy to solve that I wonder why no simple and easy to understand answer hes been posted yet. I’ve found answers explaining how to create a *new event, changing the event direction, -bubble, etc. However, I have not found a Q/A regarding catch a signal and then bounce it off to the user class, and then to a class that the is user of that user class and so on and so forth.
Having said that, here is my question.
My class, ClassOne, receive the signal of a button and then has to pass that signal to ClassTwo, which in turn passes the signal to ClassThree, how that heck do I do this in JavaFx.
Please note that the class must not fire a new event, but the same event that has been caught.
Below is a grammatical explanation of what I am trying to do.
Any help, and I mean any input would be most appreciated.
public class MyBoxedButton extends HBox {
private Button btn;
MyBoxedButton(){
// Initialization of all the objects
btn = new Button();
//catch the event emitted by the button
btn.setOnAction((ActionEvent e) ->{
// fire/emit the same received event
?????
});
}
}
/*
This class catches the event emitted by MyBoxedButton and then passes it to ClassThree,
but this does not work, how then can I catch the event and then re-emit it.
*/
class ClassTwo(){
private MyBoxedButton mbb;
public ClassTwo(){
mbb = new MyBoxedButton();
//catch the event emitted by MyBoxedButton
????
// re-emit the caught event
????
}
}
/*
This class catches the event emitted by ClassTwo.
The exersice is ment to show how the messages flow
form one object to a next and then to a next, so on and so forth.
*/
class ClassThree(){
private ClassTwo c2;
public ClassThree(){
c2 = new ClassTwo();
//catch the event emitted by MyBoxedButton
????
// re-emit the caught event
????
}

Answer 1

As long as your wrapper classes also extend Node, fireEvent should do the trick, I think.
MyBoxedButton and ClassTwo will have to provide a way to register a listener.
I've written the SimpleEventHandlerProperty helper class, which makes this easier. Here is a code snippet from a sample class which uses SimpleEventHandlerProperty to allow to register an ActionEvent handler.
private final ObjectProperty<EventHandler<ActionEvent>> onNewSampleAction = new SimpleEventHandlerProperty<>(this,
"onNewSampleAction", ActionEvent.ACTION, this::setEventHandler);
public final EventHandler<ActionEvent> getOnNewSampleAction() {
return onNewSampleActionProperty().get();
}
public final void setOnNewSampleAction(EventHandler<ActionEvent> contentChanged) {
onNewSampleActionProperty().set(contentChanged);
}
public ObjectProperty<EventHandler<ActionEvent>> onNewSampleActionProperty() {
return onNewSampleAction;
}
Then ClassTwo and ClassThree can register a listener as required.
The helper class is available at Maven Central:
<dependency>
<groupId>org.drombler.commons</groupId>
<artifactId>drombler-commons-fx-core</artifactId>
<version>0.13</version>
</dependency>